A
How Does a Hoverboard Work?
If you're looking to buy a gift for your children，why not keep up with the trend and get the best hoverboard?
The device may have many designs，but the mechanism itself isn't complicated.
Basically，a standard hoverboard contains：
·Battery: stores the electrical power.Almost all hoverboards use a highwatt lithiumion battery.
·Gyroscope(one for each wheel): allows riders to tilt(倾斜) the hoverboard while maintaining balance and adjusting their direction.
·Motor ( one in each wheel): provides the power to the wheels to keep the rider balanced and upright.
·Logic board：functions as the hoverboard brain.It processes data—your speed，tilt，etc.—and sends information to the motors. This unit controls the power of the board so riders can adjust their speed.
All the above components work together to control the power and tilt of the hoverboards so the rider is balanced，upright and moving at a controlled speed.
Why Buy a Hoverboard?
Undoubtedly，hoverboards are cool.You've probably seen kids riding one around the house.They're a phenomenon and everybody wants in.So，why deny your kids and prevent them from being part of this trend?
Where Is a Hoverboard Legal?
Despite their wild popularity，hoverboards have yet to become “streetlegal”．Currently，some places prohibit anyone under 16 from using these devices，and hoverboards are banned in academic institutions and public places，like campus buildings，parks，shopping malls and subway stations.Some places have also put speed limits on the devices and restricted their use to bike paths.However，open areas—including your yard—are free of these restrictions.
1．The logic board of a hoverboard can________．
A．store electricity
B．power the wheels
C．send information to the riders
D．receive data and give command
2．According to the passage，a hoverboard can be used________.
A．on campus B．in parks
C．on bike paths D．in shopping malls
3．What is the main purpose of this passage?
A．To evaluate a gift's quality.
B．To recommend a gift choice.
C．To compare new hoverboard models.
D．To clarify functions of the latest hoverboards.
【语篇解读】 文章介绍了一种在孩子中非常受欢迎的新式礼物——平衡车，并说明了它的使用方法、工作原理等相关内容。
1．解析：细节理解题。根据题干中的关键词logic board可以找到How Does a Hoverboard Work？的相关内容。根据“It processes data...and sends information to the motors.”可知，logic board可以收集数据并将信息传给发动机，故正确答案是D。
答案：D
2．解析：细节理解题。根据文章最后一段中的“...hoverboards are banned in academic institutions and public places，like campus buildings，parks，shopping malls and subway stations.”可知，A、B、D项都不正确，故正确答案是C。
答案：C
3．解析：写作意图题。根据文章第一段“If you're looking to buy a gift for your children，why not keep up with the trend and get the best hoverboard？”可知，文章主要是为小朋友推荐一件礼物，故正确答案是B。
答案：B
